Sand Casting Valve Stem Cap 1)Grey Iron, Ductile Iron 2)Sand Casting ... Casting Process3)Machined by NC Machine and CNC4)ISO9001:2008Stem Cap, Gate Valve PartGrey Iron, Ductile IronSand Casting ProcessMachined by ... Casting, Forging and Stamping etc.3) Machining Types: Machined by Round Bar and steel plate, Drilling, Milling, Turning, Boring, Slating, ... JIS, UNI, ANSI, ISO etc. Sand Casting Valve Stem Cap